DMB vs. RCKSX

Last updated Jun 25, 2026

DMB (Dimensional Multi-Blend Fund) and RCKSX (Rock Oak Core Growth Fund) are both Large Cap Blend Equities funds. Over the past 10 years, DMB returned 2.01%/yr vs 11.43%/yr for RCKSX. At a 0.14 correlation, their price movements are largely independent. DMB charges 0.03%/yr vs 1.25%/yr for RCKSX.

Performance

DMB vs. RCKSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Dimensional Multi-Blend Fund (DMB) and Rock Oak Core Growth Fund (RCKSX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, DMB achieves a 2.57% return, which is significantly lower than RCKSX's 15.52% return. Over the past 10 years, DMB has underperformed RCKSX with an annualized return of 2.01%, while RCKSX has yielded a comparatively higher 11.43% annualized return.

DMB

• 1D: 0.36%
• 1M: 2.41%
• YTD: 2.57%
• 6M: 4.76%
• 1Y: 14.49%
• 3Y*: 5.29%
• 5Y*: -1.45%
• 10Y*: 2.01%

RCKSX

• 1D: 0.04%
• 1M: 0.64%
• YTD: 15.52%
• 6M: 13.43%
• 1Y: 19.65%
• 3Y*: 19.39%
• 5Y*: 7.84%
• 10Y*: 11.43%

*Multi-year figures are annualized to reflect compound growth (CAGR)

DMB vs. RCKSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
DMB Dimensional Multi-Blend Fund	2.57%	10.69%	3.87%	2.42%	-23.23%	7.04%	0.75%	28.84%	-3.89%	11.52%
RCKSX Rock Oak Core Growth Fund	15.52%	12.99%	15.12%	15.57%	-18.09%	9.96%	13.75%	19.05%	-2.14%	22.69%

Correlation

The correlation between DMB and RCKSX is 0.09, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.09
Correlation (3Y) Calculated over the trailing 3-year period	0.20
Correlation (5Y) Calculated over the trailing 5-year period	0.22
Correlation (10Y) Calculated over the trailing 10-year period	0.18
Correlation (All Time) Calculated using the full available price history since Apr 26, 2013	0.14

The correlation between DMB and RCKSX shifts across timeframes, from 0.09 (1 year) to 0.22 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

DMB vs. RCKSX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

DMB

DMB Risk / Return Rank: 39
DMB Sharpe Ratio Rank: 40
DMB Sortino Ratio Rank: 45
DMB Omega Ratio Rank: 46
DMB Calmar Ratio Rank: 30
DMB Martin Ratio Rank: 33

RCKSX

RCKSX Risk / Return Rank: 60
RCKSX Sharpe Ratio Rank: 45
RCKSX Sortino Ratio Rank: 46
RCKSX Omega Ratio Rank: 37
RCKSX Calmar Ratio Rank: 94
RCKSX Martin Ratio Rank: 80

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

DMB vs. RCKSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Dimensional Multi-Blend Fund (DMB) and Rock Oak Core Growth Fund (RCKSX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	DMB	RCKSX	Difference
Sharpe ratio: Return per unit of total volatility	1.62	1.75	-0.13
Sortino ratio: Return per unit of downside risk	2.44	2.52	-0.08
Omega ratio: Gain probability vs. loss probability	1.32	1.29	+0.03
Calmar ratio: Return relative to maximum drawdown	1.82	4.90	-3.09
Martin ratio: Return relative to average drawdown	6.54	13.53	-6.99

DMB vs. RCKSX - Sharpe Ratio Comparison

The current DMB Sharpe Ratio is 1.62, which is comparable to the RCKSX Sharpe Ratio of 1.75. The chart below compares the historical Sharpe Ratios of DMB and RCKSX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

DMB vs. RCKSX - Drawdown Comparison

The maximum DMB drawdown since its inception was -40.15%, smaller than the maximum RCKSX drawdown of -57.88%. Use the drawdown chart below to compare losses from any high point for DMB and RCKSX.

Drawdown Indicators

	DMB	RCKSX	Difference
Max Drawdown Largest peak-to-trough decline	-40.15%	-57.88%	+17.73%
Max Drawdown (1Y) Largest decline over 1 year	-8.00%	-4.14%	-3.86%
Max Drawdown (3Y) Largest decline over 3 years	-22.06%	-18.22%	-3.84%
Max Drawdown (5Y) Largest decline over 5 years	-40.15%	-22.54%	-17.61%
Max Drawdown (10Y) Largest decline over 10 years	-40.15%	-33.10%	-7.05%
Current Drawdown Current decline from peak	-18.56%	-0.42%	-18.14%
Average Drawdown Average peak-to-trough decline	-14.30%	-9.48%	-4.82%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.22%	1.50%	+0.72%

Volatility

DMB vs. RCKSX - Volatility Comparison

The current volatility for Dimensional Multi-Blend Fund (DMB) is 1.58%, while Rock Oak Core Growth Fund (RCKSX) has a volatility of 3.27%. This indicates that DMB experiences smaller price fluctuations and is considered to be less risky than RCKSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DMB	RCKSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.58%	3.27%	-1.69%
Volatility (6M) Calculated over the trailing 6-month period	6.92%	8.06%	-1.14%
Volatility (1Y) Calculated over the trailing 1-year period	9.00%	11.73%	-2.73%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.67%	15.64%	-0.97%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.20%	17.49%	-2.29%

DMB vs. RCKSX - Expense Ratio Comparison

DMB has a 0.03% expense ratio, which is lower than RCKSX's 1.25% expense ratio.

Dividends

DMB vs. RCKSX - Dividend Comparison

DMB's dividend yield for the trailing twelve months is around 4.58%, less than RCKSX's 5.42% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DMB Dimensional Multi-Blend Fund	4.58%	3.93%	3.48%	4.46%	5.80%	4.42%	4.54%	4.36%	5.36%	4.89%	5.97%	6.06%
RCKSX Rock Oak Core Growth Fund	5.42%	6.26%	0.47%	0.71%	1.00%	4.31%	16.56%	3.18%	0.59%	5.91%	0.70%	3.21%

Frequently Asked Questions

Can I hold both DMB and RCKSX in my portfolio?

DMB and RCKSX have a correlation of 0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, DMB or RCKSX?

RCKSX has higher volatility (3.27%) compared to DMB (1.58%). In terms of maximum drawdown, DMB dropped -40.15% vs RCKSX's -57.88%.

Which has better risk-adjusted returns?

RCKSX currently has the higher Sharpe Ratio (1.75 vs 1.62), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.